D&C 64

 After teaching about forgiveness and tithing, the Lord counsels - 

"Wherefore, be not weary in well-doing, for ye are laying the foundation of a great work. And out of small things proceedeth that which is great.

34 Behold, the Lord requireth the heart and a willing mind; and the willing and obedient shall eat the good of the land of Zion in these last days."  (Doctrine and Covenants 64:33–34)

That goes for me in my calling.